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CVE PROGRAM SOURCE RECORDUnscored

CVE-2024-50006

ext4: fix i_data_sem unlock order in ext4_ind_migrate()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: fix i_data_sem unlock order in ext4_ind_migrate() Fuzzing reports a possible deadlock in jbd2_log_wait_commit. This issue is triggered when an EXT4_IOC_MIGRATE ioctl is set to require synchronous updates because the file descriptor is opened with O_SYNC. This can lead to the jbd2_journal_stop() function calling jbd2_might_wait_for_commit(), potentially causing a deadlock if the EXT4_IOC_MIGRATE call races with a write(2) system call. This problem only arises when CONFIG_PROVE_LOCKING is enabled. In this case, the jbd2_might_wait_for_commit macro locks jbd2_handle in the jbd2_journal_stop function while i_data_sem is locked. This triggers lockdep because the jbd2_journal_start function might also lock the same jbd2_handle simultaneously. Found by Linux Verification Center (linuxtesting.org) with syzkaller. Rule: add

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • e8238f9a8339b3578c85e4192a7a23bc2bdc0333 to < 4192adefc9c570698821c5eb9873320eac2fcbf1affected
  • e8238f9a8339b3578c85e4192a7a23bc2bdc0333 to < 3c46d6060d3e38de22196c1fe7706c5a3c696285affected
  • e8238f9a8339b3578c85e4192a7a23bc2bdc0333 to < 53b1999cfd2c7addf2e581a32865fe8835467b44affected
  • e8238f9a8339b3578c85e4192a7a23bc2bdc0333 to < ef05572da0c0eb89614ed01cc17d3c882bdbd1ffaffected
  • e8238f9a8339b3578c85e4192a7a23bc2bdc0333 to < 9fedf51ab8cf7b69bff08f37fe0989fec7f5d870affected
  • e8238f9a8339b3578c85e4192a7a23bc2bdc0333 to < d43776b907659affef1de888525847d64b244194affected
  • e8238f9a8339b3578c85e4192a7a23bc2bdc0333 to < 6252cb6bde7fc76cb8dcb49d1def7c326b190820affected
  • e8238f9a8339b3578c85e4192a7a23bc2bdc0333 to < d58a00e981d3118b91d503da263e640b7cde6729affected
  • e8238f9a8339b3578c85e4192a7a23bc2bdc0333 to < cc749e61c011c255d81b192a822db650c68b313faffected

Linux Linux

Default version status: affected

  • 3.10affected
  • 0 to < 3.10unaffected
  • 4.19.323 to ≤ 4.19.*unaffected
  • 5.4.285 to ≤ 5.4.*unaffected
  • 5.10.227 to ≤ 5.10.*unaffected
  • 5.15.168 to ≤ 5.15.*unaffected
  • 6.1.113 to ≤ 6.1.*unaffected
  • 6.6.55 to ≤ 6.6.*unaffected
  • 6.10.14 to ≤ 6.10.*unaffected
  • 6.11.3 to ≤ 6.11.*unaffected
  • 6.12 to ≤ *unaffected

References